Gemini-PMX350-mix-sm维修电路原理图.pdf

Page 1 SERVICE MANUAL PMX-350 Professional Mixer Gemini Sound Products Corp. 120 Clover Place P.O. Box 6928 Edison, NJ 08818-6928 732-738-9003 (Phone) 732-738-9006 (Fax) CONTENTS: Connections & Operations:.Page 2-3 Specifications:.Page 3 Parts Lists:.Page 4 PCBs:.Page 5 Schematics.Page 6 RadioFans.CN 收音机爱 好者资料库 Page 2 21 1 2 3 6 5 4 16 9 7 8 10 1311 1312 13 1917 14 18 19 20 1526 2122 2123 24 27 25 RadioFans.CN 收音机爱 好者资料库 Page 3 Introduction Congratulations on purchasing a Gemini model PMX -350 mixer. This- state-of-the-art mixer includes the latest features and is backed by a three year warranty, excluding crossfader and channel slides. Prior to use, we suggest that you carefully read all the instructions. Features 2 Phono/Line Convertible, 1 Phono, 1 Line and 1 Mic input Gain controls for each channel Removable Crossfader Cue Section Cautions 1. All operating instructions should be read before using this equipment. 2. To reduce the risk of electrical shock, do not open the unit. There are NO USER REPLACEABLE PARTS INSIDE. Please refer servicing to a qualified service technician. 3. Do not expose this unit to direct sunlight or to a heat source such as a radiator or stove. 4. This unit should be cleaned only with a damp cloth. Avoid solvents or other cleaning detergents. 5. When moving this equipment, it should be placed in its original carton and packaging. This will reduce the risk of damage during transit. 6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. 7. DO NOT USE SPRAY CLEANERS OR LUBRICANTS ON CONTROLS OR SWITCHES. Connections 1. Make sure that the POWER (22) switch is in the off position. 2. This unit comes supplied with a 15 volt AC adaptor. Plug the male pin of the adaptor into the rear panel POWER JACK (6). Then plug the adaptor into a proper power source. 3. To connect the mixer to your amplifier, use the MASTER (1) jacks on the rear panel. 4. The unit is equipped with one microphone input. The MIC JACK (15) is a 1/4 (6.35 mm) and is located on the front panel. 5. On the rear panel are 2 stereo PHONO/LINE (3, 4) inputs, 1 stereo PHONO (5) input and 1 stereo LINE (2) input. The PHONO/LINE SWITCHES (8, 9) enable you to set the (3, 4) inputs to Phono or Line. The PHONO (5) input will accept turntable inputs only. A GROUND (7) screw for you to ground your turntables is located on the rear panel. The stereo LINE (2) input will accept any line level input such as a CD player or a cassette player. 6. Headphones can be plugged into the front panel mounted HEADPHONE (26) jack. Operation 1. POWER ON: Once you have made all the equipment connections to your mixer, press the POWER (22) switch. The power will turn on and the POWER LED (21) will glow RED. 2. CHANNEL 1: The GAIN (12) control allows you to individually adjust the gain of Channel 1. Switch (13) allows you to select PHONO 1 (5) or the LINE 1/PHONO 2 (4) inputs. CHANNEL SLIDE (14) controls the input level of this channel. 3. CHANNEL 2: The GAIN (23) control allows you to individually adjust the gain of Channel 2. Switch (24) allows you to select the LINE 2/ PHONO 3 (3) or the LINE 3 (2) input. The CHANNEL SLIDE (25) controls the input level of this channel. 4. CROSSFADER SECTION: The CROSSFADER (20) allows the mixing of one source into another. The left side of the CROSSFADER is CHANNEL 1 and the right side is CHANNEL 2. The CROSSFADER in your unit is removable and, should the need arise, can be easily replaced. Crossfader units are available in two varieties: part RF-45 (which is identical to the crossfader supplied with this mixer) has a 45 mm travel from side-to-side, while the PSF-45 is equipped with a special “curve” designed for scratch mixing. To install a new crossfader: 1. Unscrew the outside FADER plate screws (B). Do not touch the INSIDE SCREWS (C). 2. Carefully lift the fader and unplug the CABLE (D). 3. Plug the new fader into the cable and place it back in the mixer. 4. Screw the fader to the mixer. 5. TALKOVER SECTION: The purpose of the talkover section is to allow the program playing to be muted so that the mic can be heard above the music. When the TALKOVER (11) button is pushed, the TALKOVER INDICATOR (10) will glow and the volume of all sources except MIC are reduced by -16 dB. MIC (17) controls the level of the talkover MIC. 6. CUE SECTION: By connecting a set of headphones (26), you can monitor either Channel 1 or Channel 2. Select Channel 1 by moving the CUE SWITCH (19) to the left. Move to the right for Channel 2. Use the CUE (18) control to adjust the headphone volume without affecting the overall mix. 7. DISPLAY: The DISPLAY (16) indicates the MASTER output left and right levels as controlled by the MASTER LEVEL (27). Specifications INPUTS: Mic.1.5mV 600 Ohm Phono.3 mV 47 kOhm Line.150 mV 27 kOhm OUTPUTS: Amp.0 dB 1V 400 Ohm Max.20V Peak to Peak GENERAL: Gain (Channels 1 - 2).0 to -20 dB Frequency Response.20 Hz - 20 kHz +/- 2 dB Distortion.0.02% S/N Ratio.better than 80 dB Talkover Attenuation.-16 dB Headphone Impedance.16 Ohm Power Source.115V/15V AC 7.5 W 230V/15V AC 7.5 W Dimensions.6.5 x 9 x 3 (165 x 221 x 85 mm) Weight.3 lbs. (1.3 kg) In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit,In the USA: If you experience problems with this unit, call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service.call 1 (732) 738-9003 for Gemini Customer Service. Do not attempt to return this equipment to yDo not attempt to return this equipment to yDo not attempt to return this equipment to yDo not attempt to return this equipment to yDo not attempt to return this equipment to your dealerour dealerour dealerour dealerour dealer. . . . . RadioFans.CN 收音机爱 好者资料库 Page 4 PANEL CONTROL PANEL REAR BOTTOM COVER BRACKET VR (SUB CHASSIS) HOLDER FADER KNOB SWING (LONG) KNOB PUSH (SMALL) KNOB BUSHING (SMALL) KNOB SLIDE (BIG) KNOB ROTARY (B TYPE) INLAY KNOB (SILVER) INLAY KNOB (RED) TRIM VR HOLDER LED (3f 17mm) PAD FOOT DUST PROOF CLOTE-VR SWING DUST PROOF CLOTH CLIP WIRE GND SCREW SCREEN SNAP RIVET Parts Lists - PCB DescriptionPart # Cabinet Parts and Packing 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Item # FACEPPMX350 034-010 032-018 021-774 022-366 023-674 002-531 002-532 002-724 003-110 148-312 148-238 003-970 003-969 049-206 159-171 159-216 049-190 146-710 046-027 003-612 Parts Lists 262-057 262-058 262-067 262-068 PRINTED CIRCUIT BOARD PMX40-1 PRINTED CIRCUIT BOARD PMX40-2 PRINTED CIRCUIT BOARD PMX40-3 PRINTED CIRCUIT BOARD PMX40-4 DescriptionPart # Printed Circuit Boards Item # 1 2 3 4 074-154 074-145 074-113 074-114 074-107 INTEGRATED CIRCUIT LB1423N INTEGRATED CIRCUIT NJM2068LD INTEGRATED CIRCUIT NJM4556L INTEGRATED CIRCUIT NJM7912FA INTEGRATED CIRCUIT NJM7812FA IC3, IC4 1C1-2, IC5-6, IC10 IC8 IC7 IC9 DesignatorsDescriptionPart # ICs Item # 1 2 3 4 5 076-094 079-027 079-012 080-091 080-104 092-078 072-035 081-004 082-018 082-019 083-080 071-066 071-161 071-084 072-113 TRANSISTOR DTC114TS RECTIFIER DIODE 1N4002 (1N4003,1N4004) ZENER DIODE 1/2W 12V LIGHT EMITTING DIODE (RED) 3.15f LIGHT EMITTING DIODE (GREEN) 3.15f PHONE JACK 6.3f MIC,PHONES SLIDE VR 45mm CH1/CH2 50KA2 SLIDE SWITCH 2P2C LEVER SWITCH 2P2C CUE CH1/CH2 LEVER SWITCH 4P2C PHONO/LINE PUSH SWITCH 2P2C L=12.5 POWER,TALKOVER ROTARY VR 16f L=20 MIC 50KA ROTARY VR 16f L=20 GAIN 10KA2 ROTARY VR 16f L=20 CUE 50KA2 RAILGLIDE VR45mm X-FADER 100KX2 Q1-4 D12, D15 D13, D16 D1-3, D7-8, D14 D4-6, D9-10, D11 J1, J7 VR2, VR6 SW6, SW7 SW3 SW2, SW4 SW1, SW5 VR3 VR1, VR5 VR4 X-FADER DesignatorsDescriptionPart # Electrical Parts Item # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 RadioFans.CN 收音机爱 好者资料库 Page 4 PCB RadioFans.CN 收音机爱 好者资料库 VR6A 50KA VR6B 50KA R71 5K6 R55 18K R70 5K6 R53 18K VR2A 50KA VR2B 50KA R20 5K6 R33 18K R21 5K6 R28 18K 2 3 1 48 IC5A 2068LD 6 5 7 IC5B 2068LD C32 10/16 C34 10/16 C31 22/16 C36 22/16 R52 10 R45 10 -VCC +VCC J6 MASTER C60 10/16 C55 10/16 R81 430 R78 47K R79 47K R83 430 SW3ASW3B VR4A 50KA VR4B 50KA C51 4.7/16 C53 4.7/16 R80 120K 2 3 1 48 IC8A 4556 6 5 7 IC8B 4556 R77 120K R91 10 R89 10 C64 220/16 C68 220/16 R92 47 R90 47 C58 472 C69 472 J7 1 2 3 4 6 9 7 5 8 B1423N IC3 B1423N D6 LED D5 LED D4 LED D3 LED D2 LED R43 47 R30 10K R34 4K3C19 10/16 R40 33K R61 33K +VCC -VCC C42 4.7P C43 4.7P +VCC -VCC CH2 CH1 CH1/CH2 CUE CUE POWER D14 LED R88 4K3 R57 470K R56 470K R86 27K R76 1K R85 27K R82 1K VR1A 10KA VR1B 10KA R35 10K VR3 50KA 2 3 1 48 IC2A 2068LD C24 10/16 C27 22/16 C17 22/16 R36 47 R39 47 C1 22/16 C3 22/16 C14 101 C13 101 J1 R26 30K1 1% R2 1K 1% R31 91K R3 1K 1% C21 10/16R25 30K1 1% 6 5 7 IC2B 2068LD MIC MIC C26 22P R5 4K3 D1 LED +VCC -VCC +VCC 1 2 3 4 6 9 7 5 8 B1423N IC4 B1423N D11 LED D10 LED D9 LED D8 LED D7 LED R44 47 R54 10K R51 4K3C38 10/16 -VCC R10 1K R9 1K VR5A 10KA VR5B 10KA R73 1K R67 1K D15 1N4002 D12 1N4002 C62 470/25 C66 470/25 +VCC -VCC Vin 1 GND 2 Vout 3 IC9 7812 Vin 2 GND 1 Vout 3 IC7 7912 C67 1/50 C63 1/50 D13 Z 12V D16 Z 12V SW5A SW5B R87 750 R84 750 POWER C61 47/16 C65 47/16 R37 1K8 R29 1K8 SW1A SW1B R32 91K +VCC -VCC 2 3 1 48 IC1A 2068LD 6 5 7 IC1B 2068LD R12 100K R17 47R38 47 R11 8K2 R19 180 R4 47K R16 8K2 R6 47K R22 180 R15 100K C7 822 C2 56 C6 273 C4 56 C9 273 C10 822 C11 22/16 C16 47/16 C15 22/16 C12 47/16 R7 1K R13 1K C5 10/16 C18 10/16 C8 10/16 C23 10/16 +VCC -VCC 2 3 1 48 IC6A 2068LD 6 5 7 IC6B 2068LD R49 100K R66 47R72 47 R48 8K2 R50 180 R41 47K R65 8K2 R46 47K R59 180 R64 100K C29 822 C28 56 C33 273 C35 56 C40 273 C46 822 C44 22/16 C37 47/16 C45 22/16 C30 47/16 R42 1K R47 1K R58 1K R74 1K C48 101 C49 101 C41 10/16 C52 10/16 C47 10/16 C50 10/16 R8 1K R18 1K R75 1K R60 1K J2 J3 J4 J5 SW2A SW2B SW2C SW2D SW4A SW4B SW4C SW4D X3 C59 47/16 C54 47/16 C56 47P C57 47P C20 0.47 C39 0.47 Q2 DTC114TS Q1 DTC114TS Q4 DTC114TS Q3 DTC114TS R69 1K8 R62 1K8 R1 20K +VCC R24 16K R23 16K R63 16K R68 16K T.O T.O 6 5 4 3 2 1 L R X-FADER 100KB AC 15V +VCC -VCC 2 3 1 48 IC10A 2068LD 6 5 7 IC10B 2068LD R99 100K R93 47R94 47 R101 8K2 R103 180 R14 47K R102 8K2 R27 47K R104 180 R100 100K C72 822 C74 56 C76 273 C75 56 C77 273 C73 822 C22 22/16 C70 47/16 C25 22/16 C71 47/16 R95 1K R96 1K R97 1K R98 1K 1 2 3 X1 X4 Page 5 Schematic RadioFans.CN 收音机爱 好者资料库